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Portrait of Andreas Wacker. Photo: Kennet Ruona

Andreas Wacker

Professor

Portrait of Andreas Wacker. Photo: Kennet Ruona

Theory and measurements of harmonic generation in semiconductor superlattices with applications in the 100 GHz to 1 THz range

Author

  • M. F. Pereira
  • J. P. Zubelli
  • D. Winge
  • Andreas Wacker
  • A. S. Rodrigues
  • V. Anfertev
  • V. Vaks

Summary, in English

This manuscript describes harmonic generation in semiconductor superlattices, starting from a nonequilibrium Green's functions input to relaxation rate-type analytical approximations for the Boltzmann equation in which imperfections in the structure lead to asymmetric current flow and scattering processes under forward and reverse bias. The resulting current-voltage curves and the predicted consequences on harmonic generation, notably the development of even harmonics, are in good agreement with experiments. Significant output for frequencies close to 1 THz (7th harmonic) at room temperature, after excitation by a 141-GHz input signal, demonstrate the potential of superlattice devices for gigahertz to terahertz applications.

Department/s

  • Mathematical Physics
  • NanoLund: Center for Nanoscience

Publishing year

2017-07-25

Language

English

Publication/Series

Physical Review B

Volume

96

Issue

4

Document type

Journal article

Publisher

American Physical Society

Topic

  • Condensed Matter Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 2469-9950